I know there are a LOT of threads, videos, etc. on key fobs. So far, I've not found an answer to this one.

I traded my 2013 335i for a 2015 740Li. I kept the spare key fob that I purchased after I bought the 335. I only have one key fob for the 740, and would like to be able to reprogram the fob from the 335 to the 740. Is this possible?

I'm not too concerned about the key, just don't want to have to order a new one from the dealer at $200